JP6534671B2 - Managing Radar Detection in Wireless Networks Using Frequency Division Duplexing - Google Patents

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This patent application was filed on September 19, 2013, each of which is assigned to the assignee of the present application and which is expressly incorporated herein by reference in its entirety. US Provisional Application No. 61 / 880,148 entitled “New Subframe Types and / or MBSFN for Efficient Radar Detection in 5 GHz for Frequency Division Duplex (FDD) Systems” and “Methods for Radar Detection filed on September 4, 2013” This application claims the benefit of US Provisional Application No. 61 / 873,636, entitled "In Frequency Division Duplex (FDD) Systems".

Reference to co-pending patent applications This patent application relates to the following co-pending US patent applications.
"RADAR DETECTION IN WIRELESS NETWORK THAT USES FREQUENCY-DIVISION, having at the same time an agent number assigned to the assignee of the present application and assigned to the assignee of the present application, and having Attorney Docket No. QC133646U1, which is expressly incorporated herein by reference in its entirety. DUPLEXING ".

INTRODUCTION Aspects of the present disclosure relate generally to radar detection in wireless networks using frequency division duplex, and more particularly to radar detection in wireless networks using frequency division duplex in the 5 GHz band.

  Wireless communication networks may be deployed to provide various types of services (eg, voice, data, multimedia services, etc.) to users within the coverage area of the network. In some implementations, one or more access points (eg, corresponding to different cells) provide wireless connectivity to access terminals (eg, cell phones) operating within the coverage of the access point. In some implementations, peer devices provide wireless connectivity to communicate with one another.

  Communication between devices in a wireless communication network may be subject to interference. For communication from a first network device to a second network device, the emission of radio frequency (RF) energy by nearby devices may interfere with the reception of signals at the second network device. For example, some wireless communication bands (e.g., the 5 GHz band or other bands) experience interference from radar systems operating within those bands.

  In some wireless communication networks, over-the-air radar detection is employed in an attempt to reduce radar interference. For example, the Unlicensed National Information Infrastructure (U-NII) network detects and avoids co-channel operation with the radar system, and in total, to achieve uniform spreading of the operating channel across the entire band Dynamic frequency selection (DFS) function can be adopted.

  The U-NII device may operate in master mode or client mode. The master initiates the U-NII network by sending control signals that may enable other U-NII devices to associate with the master. The client operates in a network controlled by a U-NII device operating in master mode.

  FIG. 1 shows an example of channel availability and DFS requirements for several 5 GHz bands. In the United States, Europe, and Japan, DFS is employed on channels 52-144. DFS may not be employed on other channels.

  In U-NII networks, radar detection is employed in certain channels within the 5 GHz band. A device and / or network operating on a channel for which radar detection is desired may repeatedly (eg, continuously) monitor that channel (and possibly other available channels) for the radar signal. it can. If a radar is detected, transmission is stopped.

  FIG. 2 shows an example of the DFS sequence. These operations may be employed, for example, to detect radar waveforms having a received signal strength above a DFS detection threshold (eg, -62 dBm).

  Table 1 shows an example of the DFS response requirement value.

  Note 1: The moment the channel travel time and channel close transmission time begin is as follows. In the case of a short pulse radar test signal this moment is the end of the burst and in the case of a frequency hopping radar test signal this moment is the end of the last radar burst generated and in the case of a long pulse radar test signal this moment Is the end of the 12 second period that defines the radar waveform.

  Note 2: The channel closure transmission time is 200 ms starting from the beginning of the channel travel time, plus some additional intermittent control signal needed to facilitate channel travel during the rest of the 10 second period. 60 ms plus). The total duration of the control signal does not count the sleep period between transmissions.

  Note 3: Radar type 1 is used during U-NII detection bandwidth detection test. For each frequency step, the lowest detection rate is 90 percent. The measurements are performed without any data traffic.

  In practice, radar detection by a device may be disturbed when the device is in communication with another device. For example, radar detection may not be possible when the device is transmitting. Thus, in the case of techniques such as Long-Term Evolution (LTE) time-division duplexing (TDD), which employ planned transmission and reception times (e.g., time slots) on the same frequency channel The time period available for radar detection may be quite limited (e.g., limited to the time when the device is not transmitting). For example, if the traffic duty cycle is relatively high (ie, high transmit / receive ratio), radar detection may be difficult due to the limited amount of time available to detect the radar. Furthermore, radar detection may be unreliable even while in receive mode (eg, when the device is simultaneously receiving data and attempting radar detection).

  The features and benefits of the present disclosure may be achieved by providing a method for managing radar detection in a wireless network. The method is configured to communicate with other devices in a wireless network, and to a first device operating in frequency division duplex mode, prior to detection of radar transmission, a number of frames in the downlink frequency band It may include the step of refraining from transmitting during sub-frames. The method may also include the step of causing the first device to transmit the first signal to the second device. The first signal may relate to monitoring radar transmissions. The method may also include the step of causing the first device to change the number of subframes of the frame of the downlink frequency band in response to the event.

  The first device is an access point, Node B, Evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic service It may be configured to perform at least one function of a set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, or a combination thereof.

  The first signal may be in accordance with a radio resource control protocol.

  The arrangement of subframes in a frame of the downlink frequency band may correspond to the arrangement of subframes designated for uplink communication in a frame configured in accordance with the first configuration of the Long Term Evolution Time Division Duplex standard. . The process of causing the first device to change the number of subframes of the frame in the downlink frequency band is the uplink in frame constructed according to the second configuration of the Long Term Evolution Time Division Duplex standard on the first device. The method may include the step of changing the arrangement of subframes in the frame of the downlink frequency band to correspond to the arrangement of subframes designated for communication.

  The method may also include the step of causing the first device to determine an increase in the load of the first device. This event may be an increase in load, and the process of causing the first device to change the number of subframes may be a step of causing the first device to reduce the number of subframes. The process of reducing the number of subframes in the first device may be the step of reducing the number of subframes in the first device to zero.

  The method may also include the step of causing the first device to determine a reduction in load of the first device. This event may be a load reduction, and the process of causing the first device to change the number of subframes may be a step of causing the first device to increase the number of subframes.

  The method may also include the step of causing the first device to receive a second signal from the second device. The second signal may relate to detection of radar transmission. This event may be the reception of a second signal. The process of causing the first device to change the number of subframes may be the step of increasing the number of subframes to the first device.

  The process of causing the first device to send the first signal to the second device may be responsive to the number of subframes being less than a threshold.

  The second apparatus may be at least one access terminal, and the first signal may be configured to cause the at least one access terminal to monitor radar transmissions.

  Alternatively, the second device may be an access point, Node B, Evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio It may be configured to perform at least one function of a router, a basic service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, or a combination thereof. The first signal may be configured to request the second device to send the second signal to the first device in response to the second device detecting a radar transmission.

  The features and benefits of the present disclosure may also be achieved by providing a first apparatus for managing radar detection in a wireless network. The first device may include a transmitter, a switch, and a circuit. The transmitter may be configured to operate in frequency division duplex mode and send a first signal to a second device. The first signal may relate to monitoring radar transmissions. The first device may be configured to communicate with other devices in the wireless network. The switch may be configured to cause the transmitter to refrain from transmitting during some subframes of the frame in the downlink frequency band prior to detection of radar transmission. The circuit may also be configured to change the number of subframes of a frame of the downlink frequency band in response to an event.

  The switch may include at least one of a relay, a semiconductor device, a micro-electromechanical switch, or a combination thereof.

  The arrangement of subframes in a frame of the downlink frequency band may correspond to the arrangement of subframes designated for uplink communication in a frame configured in accordance with the first configuration of the Long Term Evolution Time Division Duplex standard. . The circuit corresponds to the arrangement of subframes designated for uplink communication in a frame configured according to the second configuration of the Long Term Evolution Time Division Duplex standard, in order to change the number of subframes. In addition, it may be configured to change the arrangement of subframes in the downlink frequency band frame.

  The circuit may also be further configured to determine an increase in load of the first device. This event may be an increase in load and the circuit may be configured to reduce the number of subframes to change the number of subframes.

  The circuit may be further configured to determine a reduction in load of the first device. This event may be load reduction and the circuit may be configured to increase the number of subframes to change the number of subframes.

  The apparatus may further include a receiver configured to receive the second signal from the second apparatus. The second signal may relate to detection of radar transmission. This event may be the reception of a second signal. The circuit may be configured to increase the number of subframes to change the number of subframes.

  The circuit may be further configured to cause the transmitter to send the first signal to the second device in response to the number of subframes being less than a threshold.

  The features and benefits of the present disclosure may also be achieved by providing a first apparatus for managing radar detection in a wireless network. The first device is configured to communicate with other devices in the wireless network, and to the first device operating in frequency division duplex mode, a number of frames in the downlink frequency band prior to detection of radar transmission. It may include means for refraining from transmitting during any subframes. The first device may also include means for causing the first device to send the first signal to the second device. The first signal may relate to monitoring radar transmissions. The first apparatus may also include means for causing the first apparatus to change the number of subframes of a frame of the downlink frequency band in response to an event.

  The first device may also include means for causing the first device to determine a change in load of the first device. This event may be a change in load.

  The first device may also include means for causing the first device to receive a second signal from the second device. The second signal may relate to detection of radar transmission. This event may be the reception of a second signal.

  The features and benefits of the present disclosure may also be achieved by providing a non-transitory computer readable recording medium for detecting radar transmissions in a wireless network. The computer readable recording medium is configured to communicate with other devices in the wireless network, and the first device operating in the frequency division duplex mode receives the frame of the downlink frequency band prior to the detection of the radar transmission. It may include at least one instruction to refrain from transmitting during some subframes. The computer readable recording medium may also include at least one instruction for causing the first device to send the first signal to the second device. The first signal may relate to monitoring radar transmissions. The computer readable recording medium may also include at least one instruction for causing the first device to change the number of subframes of a frame of the downlink frequency band in response to an event.

  The arrangement of subframes in a frame of the downlink frequency band may correspond to the arrangement of subframes designated for uplink communication in a frame configured in accordance with the first configuration of the Long Term Evolution Time Division Duplex standard. . At least one instruction to cause the first device to change the number of subframes of a frame in the downlink frequency band is configured to the first device according to a second configuration of the long term evolution time division duplex standard. At least one instruction for changing the arrangement of subframes in the frame of the downlink frequency band may be included to correspond to the arrangement of subframes designated for uplink communication in the frame.

  The computer readable recording medium may also include at least one instruction for causing the first device to determine an increase in load on the first device. This event may be an increase in load and at least one instruction to cause the first device to change the number of subframes includes at least one instruction to cause the first device to reduce the number of subframes obtain.

  The computer readable recording medium may also include at least one instruction for causing the first device to determine a reduction in load of the first device. This event may be a load reduction and at least one instruction to cause the first device to change the number of subframes includes at least one instruction to cause the first device to increase the number of subframes obtain.

  The computer readable recording medium may also include at least one instruction for causing the first device to receive a second signal from the second device. The second signal may relate to detection of radar transmission. This event may be the reception of a second signal. The at least one instruction to cause the first device to change the number of subframes may include at least one instruction to cause the first device to increase the number of subframes.

  These and other exemplary aspects of the present disclosure are set forth in the detailed description and claims that follow, and in the accompanying drawings.

FIG. 5 is a simplified diagram illustrating an example of a DFS in the 5 GHz band. FIG. 7 is a simplified diagram illustrating an example of a DFS sequence. FIG. 1 is a simplified block diagram of several sample aspects of a communication system adapted to support radar detection. It is a figure of the conventional time division duplex structure. FIG. 5 is a diagram of a predetermined configuration of a frame according to the Long Term Evolution Time Division Duplex standard. It is a figure of the conventional frequency division duplex structure. FIG. 1 illustrates an example of a first apparatus for managing radar detection in a wireless network in accordance with the present disclosure. 2 is a flowchart of an example method for managing radar detection in a wireless network in accordance with the present disclosure. FIG. 10 is a simplified block diagram of several sample aspects of components that may be employed within a communications node. FIG. 1 is a simplified diagram of a wireless communication system. FIG. 1 is a simplified diagram of a wireless communication system including small cells. FIG. 5 is a simplified diagram illustrating coverage area for wireless communication. FIG. 10 is a simplified block diagram of several sample aspects of communication components. FIG. 10 is a simplified block diagram of several sample aspects of an apparatus configured to support radar detection as taught herein.

  By convention, the various features shown in the drawings may not be drawn to scale. Thus, the dimensions of the various features may be arbitrarily expanded or reduced for clarity. In addition, some of the drawings may be simplified for clarity. Thus, the drawings may not depict all of the components of a given apparatus (e.g., device) or method. Finally, similar reference signs may be used to indicate similar features throughout the present specification and figures.

  Aspects of the present disclosure generally relate to radar detection in wireless networks that use frequency division duplexing. In general, a device operating in frequency division duplex mode and configured to communicate with an access terminal in a wireless network has a downlink frequency band in response to the device being designated to monitor radar transmissions. It is possible to refrain from transmitting during at least one subframe of the frame of at least one of the frames of the downlink frequency band, in response to the device being designated to monitor the radar transmission. It is possible to monitor radar transmission during one subframe. In some cases, in the first alternative, the arrangement of at least one subframe in a frame of the downlink frequency band is for uplink communication in a frame of a wireless network operating according to the long term evolution time division duplex standard It may correspond to the arrangement of at least one subframe specified in. In some cases, in the second alternative, the placement of at least one subframe in a frame of the downlink frequency band corresponds to the placement of at least one subframe designated for transmission according to the Multimedia Broadcast Multicast Service specification obtain.

  More specific aspects of the present disclosure are provided in the following description and related drawings of various examples provided for illustration. Alternate aspects may be devised without departing from the scope of the present disclosure. In addition, well-known aspects of the present disclosure may not be described in detail or may be omitted so as not to obscure further relevant details.

  FIG. 3 shows several nodes of an exemplary communication system 300 (eg, part of a communication network). For purposes of illustration, various aspects of the present disclosure are described in the context of one or more access terminals, access points, and network entities that communicate with one another. However, it will be appreciated that the teachings herein may be applicable to other types of devices or other similar devices, which are referred to using other terminology. For example, in various implementations, the access point may be referred to or implemented as a base station, Node B, eNodeB, home NodeB, home eNodeB, small cell, macro cell, femto cell, etc. Although the access terminal may be referred to or implemented as a user equipment (UE), a mobile station, etc.

  An access point within system 300 may be located within the coverage area of system 300 or may move across the coverage area, for one or more wireless terminals (eg, access terminal 302 or access terminal 304). Provide access to one or more services (eg, network connection). For example, at various times, access terminal 302 may connect to access point 306 or some other access point (not shown) in system 300. Similarly, access terminal 304 may connect to access point 306 or some other access point.

  Each of the access points may communicate with one or more network entities (for convenience represented by network entity 308), including communicating with each other to facilitate wide area network connectivity. it can. Two or more of such network entities may be co-located and / or two or more of such network entities may be distributed throughout the network .

  The network entities may take various forms, such as, for example, one or more wireless network entities and / or core network entities. Thus, in various implementations, the network entity 308 can perform network management (eg, via operations, administration, management, and provisioning entities), call control, session management, mobility management, gateway functions, interworking functions, Or may represent a function such as at least one of several other suitable network functions. In some aspects, mobility management tracks the current location of the access terminal through the use of a tracking area, a location area, a routing area, or some other suitable technique, and controls paging of the access terminal. And providing access control to the access terminal.

  As indicated above with reference to FIG. 3, reception of wireless signals at access point 306 (or any other device in system 300) may be subject to interference from radar source 310. In accordance with the teachings herein, the access point 306 includes a radar detector 312 that implements radar detection.

  In some implementations, radar detector 312 may be configured to receive the electromagnetic radiation and determine whether the electromagnetic radiation is a transmission from radar source 310. Radar transmissions may be classified, for example, into various types characterized by their pulse width, pulse repetition interval, and the number of pulses transmitted within a time period. Those skilled in the art will appreciate other features by which radar transmissions may be classified. Radar detector 312 may be configured, for example, to determine whether a match exists between the characteristics of the electromagnetic radiation and the characteristics of the various radar types. If a match exists, the radar detector 312 can determine, for example, whether the power level of the electromagnetic radiation exceeds a threshold. If the power level of the electromagnetic radiation exceeds a threshold, the radar detector 312 causes, for example, the device 306 to change downlink communication to a different channel required by Dynamic Frequency Selection (DFS). It is possible.

  In the example of FIG. 3, access point 306 is shown as including a radar detector 312. In different implementations, some or all of the functionality of the radar detector 312 may be embodied in different entities. For example, in some implementations, the access terminal can employ radar detection.

  FIG. 4 is a diagram of a conventional time division duplex configuration 400. Configuration 400 includes a first device 402 and a second device 452. The first device 402 includes a transmitter 404, a receiver 406, an antenna 408, and a switch 410. Second device 452 includes a transmitter 454, a receiver 456, an antenna 458, and a switch 460. Communication from the first device 402 to the second device 452 and communication from the second device 452 to the first device 402 are performed on the same carrier frequency using time division duplex. Communications are parsed into data units at time intervals. Such units are known as frames. The frame itself is parsed into several subframes. Using time division duplex, communication occurs in a first direction (eg, from the first device 402 to the second device 452) during a first subframe and during a second subframe, It occurs in a second direction (eg, from the second device 425 to the first device 402).

  For example, during the first subframe, switch 410 couples transmitter 404 to antenna 408 and switch 460 couples receiver 456 to antenna 458 so that first device 402 to second device 452 Communication occurs in a first direction to. The first device 402 is an access point, node B, evolved node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic At least one of a service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc. configured to perform a function, and the second device 452 is an access terminal etc. Communication in the first direction is known as the downlink.

  For example, during the second subframe, switch 410 couples receiver 406 to antenna 408 and switch 460 couples transmitter 454 to antenna 458 so that second device 452 to first device 402. Communication occurs in a second direction to. The first device 402 is an access point, node B, evolved node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic Communication in the second direction is configured to perform at least one function of a service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc. Also known as uplink.

  FIG. 5 is a diagram 500 of predetermined configurations of frames in accordance with the Long Term Evolution (LTE) Time Division Duplex (TDD) standard. Each frame of the LTE TDD standard includes 10 subframes (ie, subframes 0 to 9). The LTE TDD standard provides seven configurations (ie, configurations 0 through 6) of a frame based on designated directions of communication during subframes. For example, in configuration 0 of the LTE TDD standard, subframes 0 and 5 are designated for communication in the downlink (D) direction, and subframes 2, 3, 4, 7, 8 and 9 are in the uplink (U) direction Subframes 1 and 6 are designated as special subframes. Similarly, for example, in configuration 1 of the LTE TDD standard, subframes 0, 4, 5, and 9 are designated for downlink (D) direction communication and subframes 2, 3, 7, and 8 are uplink. Subframes 1 and 6 are designated as special subframes, which are designated for communication in the (U) direction.

  Referring to the conventional time division duplex configuration 400 shown in FIG. 4 and the configuration 0 of the LTE TDD standard of FIG. 500 shown in FIG. 5, for example, during subframe 4 (U), switch 410 receives receiver 406. Coupled to the antenna 408, the switch 460 couples the transmitter 454 to the antenna 458 so that communication occurs in the uplink direction from the second device 452 to the first device 402. For example, during sub-frame 5 (D), switch 410 couples transmitter 404 to antenna 408, and switch 460 couples receiver 456 to antenna 458, resulting in the first device 402 to the second device. Communication occurs in the downlink direction to 452.

  FIG. 6 is a diagram of a conventional frequency division duplex configuration 600. Configuration 600 includes a first device 602 and a second device 652. The first device 602 includes a transmitter 604, a receiver 606, a first antenna 608, and a second antenna 610. Second device 652 includes a transmitter 654, a receiver 656, a first antenna 658, and a second antenna 660. Communication from the first device 602 to the second device 652 is performed on the first carrier frequency, and communication from the second device 652 to the first device 602 is second, using frequency division duplexing. It is performed at the carrier frequency. Using frequency division duplex, communications may be in a first direction (eg, from the first wireless device 602 to a second wireless device 652) and in a second direction (eg, the second wireless device 652). From the first wireless device 602). Nevertheless, the communication is still parsed into frames, and the frames themselves are parsed into subframes.

  For example, communication in the first direction may occur from the transmitter 604 via the first antenna 608 to the receiver 656 via the second antenna 660 at a first carrier frequency, and simultaneously in the second direction. Communication occurs from the transmitter 654 via the first antenna 658 to the receiver 606 via the second antenna 610 at a second carrier frequency. The first device 602 is an access point, node B, evolved node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic The second device 652 is configured to perform at least one function of a service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc. If so, communication in the first direction is known as the downlink and the first carrier frequency defines the downlink frequency band. The first device 602 is an access point, node B, evolved node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic The second device 652 is configured to perform at least one function of a service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc. If so, communication in the second direction is known as the uplink and the second carrier frequency defines the uplink frequency band.

  It will be appreciated by those skilled in the art that, in practice, wireless networks typically experience much greater amounts of data flow in the downlink direction than in the uplink direction. This complicates the ability of a wireless communication system operating in frequency division duplex mode to implement dynamic frequency selection (DFS) to detect the presence of radar transmission in the downlink frequency band.

  FIG. 7 is a diagram of an example of a first apparatus 306 for managing radar detection in a wireless network 700, in accordance with the present disclosure. Wireless network 700 may also include a second device 702 and a third device 704. For example, the first device 306 may be an access point, Node B, evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router It may be configured to perform at least one function of: basic service set, enhanced service set, macro cell, macro node, home eNB, femto cell, femto node, pico node, relay node, and so on. For example, the second device 702 may be an access point, node B, evolved node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router It may be configured to perform at least one function of: basic service set, enhanced service set, macro cell, macro node, home eNB, femto cell, femto node, pico node, relay node, and so on. For example, third device 704 may be access terminal 302.

  The first device 306 may include a transmitter 706, a switch 708, and a circuit 710. The first device 306 may be configured to communicate with other devices (eg, the second device 702, the third device 704, etc.) in the wireless network 700. The transmitter 706 may be configured to operate in frequency division duplex mode and send a first signal to the second device 702, the third device 704, or both. The first signal may relate to monitoring transmissions from the radar source 310. The switch 708 may be configured to cause the transmitter 706 to refrain from transmitting during some subframes of the frame in the downlink frequency band prior to detection of transmissions from the radar source 310. For example, the switch 708 may be placed in the open position during that number of subframes of the frame in the downlink frequency band prior to detection of transmissions from the radar source 310. Monitoring of transmissions from radar source 310 may occur during subframes that refrain from transmitting. Circuit 710 may be configured to change the number of subframes of a frame in the downlink frequency band in response to an event.

  Switch 708 may include, for example, a relay, a semiconductor device, a micro-electromechanical switch, or a combination of these devices. Those skilled in the art will appreciate that other manners can cause transmitter 706 to refrain from transmitting during that number of subframes of the frame in the downlink frequency band so that an implementation of apparatus 306 can be achieved without switch 708. Will be understood. For example, the transmitter 706 may modulate the input signal (not shown) prior to transmission, and by preventing the input signal from being input to the transmitter 706 during this period, or In the meantime, by preventing the input signal from being modulated by the transmitter 706, it is possible to cause the transmitter 706 to refrain from transmitting during that number of subframes of the frame in the downlink frequency band. Those skilled in the art will understand.

  Although implementations of the present disclosure do not depend on the particular arrangement of subframes in the downlink frequency band frame, certain advantages may be realized from doing so.

  For example, the arrangement of subframes in a frame of the downlink frequency band is the arrangement of subframes designated for uplink communication in a frame configured according to the Long Term Evolution (LTE) Time Division Duplex (TDD) standard It can correspond. Those skilled in the art will appreciate the advantages and disadvantages of time division duplexing and frequency division duplexing, respectively. Furthermore, because each of these modes has particular advantages, the LTE standard incorporates a process for wireless systems that can operate in both modes. Advantageously, the arrangement of subframes in the frame of the downlink frequency band corresponds to the arrangement of subframes designated for uplink communication according to the LTE TDD standard: time division duplex mode and frequency division duplex mode Encourages action on both.

  For example, the arrangement of subframes in a frame of the downlink frequency band may correspond to the arrangement of subframes designated for uplink communication in a frame configured according to the first configuration of the LTE TDD standard. For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in a frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , May correspond to an arrangement of subframes designated for uplink communication in a frame configured according to configuration 1 of the LTE TDD standard. Returning to FIG. 7, according to this aspect, the circuit 710 is configured to specify sub-links for uplink communications in a frame configured according to the second configuration of the LTE TDD standard to change the number of subframes. The arrangement of subframes within the frame of the downlink frequency band may be configured to correspond to the arrangement of the frame. For example, referring to the LTE TDD standard in the diagram 500 shown in FIG. 5, the arrangement of subframes in a frame of the downlink frequency band is subframe 2 in total of one subframe. Configuration 5 of the LTE TDD standard It may be modified to correspond to the arrangement of subframes designated for uplink communication in frames configured according to.

  Returning to FIG. 7, the circuit 710 may be further configured to determine an increase in load on the first device 306. According to this aspect, the circuit 710 may be configured to reduce the number of subframes in response to an increase in the load of the first device 306 to change the number of subframes. For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in the frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , Circuit 710 corresponds to the increase of the load of the first device 306, corresponding to the arrangement of subframes designated for uplink communication in a frame configured according to configuration 1 of the LTE TDD standard. In order to reduce the number of subframes, subframes 2 and 7, a total of 2 subframes, of subframes designated for uplink communication in a frame, as configured according to configuration 2 of the LTE TDD standard. It may be configured to change the arrangement. Reducing the number of subframes refraining from transmitting from 4 (eg, LTE TDD standard configuration 1) to 2 (eg, LTE TDD standard configuration 2) meets the increased load of the first device 306 In order to allow more subframes to be used for transmission. In this described example, the change from configuration 1 of the LTE TDD standard to configuration 2 of the LTE TDD standard results in four subframes designated for downlink communication (e.g. subframes 0, 4,. 5 and 9) to 6 (eg, subframes 0, 3, 4, 5, 8 and 9), so that more to transmit for the purpose of meeting the increased load of the first device 306 Subframes become available.

  Returning to FIG. 7, the circuit 710 may be further configured to determine the reduction in load of the first device 306. According to this aspect, the circuit 710 may be configured to increase the number of subframes in response to the reduction of the load of the first device 306 to change the number of subframes. For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in the frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , Circuit 710 corresponds to the load reduction of the first apparatus 306, corresponding to the arrangement of subframes designated for uplink communication in a frame configured according to configuration 1 of the LTE TDD standard. Uplink in the frame to be configured according to configuration 0 of the LTE TDD standard, which is subframes 2, 3, 4, 7, 8, and 9, a total of 6 subframes, to increase the number of It may be configured to change the arrangement of subframes designated for communication. Increasing the number of subframes to refrain from transmitting from 4 (eg, LTE TDD standard configuration 1) to 6 (eg, LTE TDD standard configuration 0) is to monitor transmissions from radar source 310 Allows many subframes to be used. In this described example, the change from configuration 1 of the LTE TDD standard to configuration 0 of the LTE TDD standard results in four subframes designated for uplink communication (e.g. 7, and 8) to 6 (eg, subframes 2, 3, 4, 7, 8, and 9), so that more subframes are available to monitor transmissions from radar source 310 become.

  Returning to FIG. 7, in some cases, the first device 306 may further include a receiver 712. Receiver 712 may be configured to receive a second signal from the second device 702, the third device 704, or both. The second signal may relate to detecting transmissions from the radar source 310. According to this aspect, circuit 710 may be configured to change the number of subframes in response to receiving the second signal.

  In some cases, circuit 710 may be configured to increase the number of subframes in response to receiving a second signal to change the number of subframes. For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in the frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , Circuit 710 corresponds to the reception of the second signal, if it corresponds to the arrangement of subframes designated for uplink communication in a frame configured according to configuration 1 of the LTE TDD standard. For uplink communication within a frame to be configured according to configuration 0 of the LTE TDD standard, which is subframes 2, 3, 4, 7, 8 and 9, for a total of 6 subframes to increase It may be configured to change the arrangement of designated subframes. Increasing the number of subframes refraining from transmitting from 4 (for example, configuration 1 of the LTE TDD standard) to 6 (for example, configuration 0 of the LTE TDD standard) is from the perspective of the reception of the second signal Less subframes are used to allow more subframes to be used to monitor transmissions from the radar source 310. In this described example, the change from configuration 1 of the LTE TDD standard to configuration 0 of the LTE TDD standard results in four subframes designated for uplink communication (e.g. 7, and 8) to 6 (eg, subframes 2, 3, 4, 7, 8, and 9), so that more subframes are available to monitor transmissions from radar source 310 Result in reducing the number of subframes designated for downlink communication from four (eg, subframes 0, 4, 5, and 9) to two (eg, subframes 0 and 5), and As a result, fewer subframes are available to transmit, reducing the likelihood of interference with transmissions from the radar source 310.

  Alternatively, the second signal may cause the first device 306 to change downlink communication to a different channel required by dynamic frequency selection (DFS).

  Returning to FIG. 7, in some cases, circuit 710 causes transmitter 706 to transmit the first signal to the second device 702, the third device in response to the number of subframes being less than the threshold. It can be further configured to be sent to 704, or both. For example, referring to the LTE TDD standard of diagram 500 shown in FIG. 5, the threshold for the number of subframes in a frame of the downlink frequency band to refrain from transmitting is 2, and within the frame of the downlink frequency band Of the subframes of subframes is designated for uplink communication in a frame configured according to configuration 5 of the LTE TDD standard, which is subframe 2, ie, one subframe whose sum is less than the threshold. The circuit 710 may be further configured to cause the transmitter 706 to send the first signal to the second device 702, the third device 704, or both, if modified to correspond to the placement of the selected subframes. . As described above, such a situation may increase the load of the first apparatus 306, which may be configured to reduce the number of subframes 710 to change the number of subframes. May occur accordingly.

  In some cases, if the third device 704 is the access terminal 302, the first signal may be configured to cause the access terminal 302 to designate transmission monitoring from the radar source 310. In this situation, monitoring transmissions from the radar source 310 may be performed by both the first device 306 and the access terminal 302 or may be performed by the access terminal 302 alone. If the wireless network 700 includes two or more access terminals (eg, access terminal 302, access terminal 304, etc.), monitoring transmissions from the radar source 310 may be one of the access terminals in the wireless network 700, Some or all may be performed by one or more of the access terminals.

  In some cases, the second device 702 may be an access point, Node B, Evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, If configured to perform at least one function of a wireless router, a basic service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc. The signal may be configured to request the second device 702 to send a second signal to the first device 306 in response to the second device 702 detecting a transmission from the radar source 310. . Circuit 710 may be configured to increase the number of subframes in response to receiving the second signal to change the number of subframes. Alternatively, the second signal may cause the first device 306 to change downlink communication to a different channel required by dynamic frequency selection (DFS).

  It is possible to combine the various aspects of the present disclosure. For example, the circuit 710 transmits by changing the arrangement of subframes designated for uplink communication in a frame configured according to the LTE TDD standard, in response to an increase in load on the first device 306. Can be configured to reduce the number of subframes in a frame of the downlink frequency band. If the result of the reduction in the number of subframes is that the number of subframes in a frame of the downlink frequency band that refrains from transmitting is less than a threshold, the circuit 710 generates the first signal as the second signal. , The third device 704, or both. If the third device 704 is the access terminal 302, the first signal may be configured to cause the access terminal 302 to designate transmission monitoring from the radar source 310. The second device 702 is an access point, node B, evolved node B, wireless network controller, base station, wireless base station, base station controller, transceiver base station, transceiver function, wireless transceiver, wireless router, basic If configured to perform at least one function of a service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc., the first signal is The second device 702 may be configured to request the second device 702 to send a second signal to the first device 306 in response to detecting the transmission from the radar source 310.

  Those skilled in the art will appreciate other ways in which various aspects of the present disclosure can be combined in addition to the described examples. Thus, the combination of aspects is not limited to the described example.

  FIG. 8 is a flowchart of an example of a method 800 for managing radar detection in a wireless network, in accordance with the present disclosure. In FIG. 8, an optional operation of method 800 is illustrated by dashed blocks. In method 800, in operation 802, a first device configured to communicate with another device in a wireless network and operating in frequency division duplex mode receives a frame of the downlink frequency band prior to detection of radar transmission. It is possible to refrain from transmitting during some subframes of. For example, referring to FIG. 7, a first network configured to communicate with other devices (eg, second device 702, third device 704, etc.) in wireless network 700 and operating in frequency division duplex mode. Device 306 may include switch 708. For example, by placing the switch 708 in an open position during some subframes of a frame in the downlink frequency band, the first device 306 may receive the downlink frequency prior to detection of transmissions from the radar source 310. It is possible to refrain from transmitting during that number of sub-frames of the frame of band.

  Those skilled in the art will appreciate that, by way of example and not limitation, non-transitory computer readable storage medium may include at least one instruction for causing an electronic processor to perform operation 802.

  Returning to FIG. 8, at operation 804, it is possible to cause the first device to send the first signal to another device. The first signal may relate to monitoring radar transmissions. In some cases, the first signal may be configured in accordance with a radio resource control protocol. For example, referring to FIG. 7, the first device 306 can include a transmitter 706, which transmits a first signal to the second device 702, the third device 704, or both. It can be configured to send.

  Those skilled in the art will appreciate that, by way of example and not limitation, non-transitory computer readable storage medium may include at least one instruction for causing an electronic processor to perform operation 804.

  Returning to FIG. 8, at operation 806, the first device can change the number of subframes of the frame in the downlink frequency band in response to the event. For example, referring to FIG. 7, the first apparatus 306 may include a circuit 710, which is configured to change the number of subframes of a frame in the downlink frequency band in response to an event. It can be done.

  Those skilled in the art will appreciate that, by way of example and not limitation, non-transitory computer readable storage medium may include at least one instruction for causing an electronic processor to perform operation 806.

  Although implementations of the present disclosure do not depend on the particular arrangement of subframes in the downlink frequency band frame, certain advantages may be realized from doing so.

  For example, the arrangement of subframes in a frame of the downlink frequency band is the arrangement of subframes designated for uplink communication in a frame configured according to the Long Term Evolution (LTE) Time Division Duplex (TDD) standard It can correspond. Those skilled in the art will appreciate the advantages and disadvantages of time division duplexing and frequency division duplexing, respectively. Furthermore, because each of these modes has particular advantages, the LTE standard incorporates a process for wireless systems that can operate in both modes. Advantageously, the arrangement of subframes in the frame of the downlink frequency band corresponds to the arrangement of subframes designated for uplink communication according to the LTE TDD standard: time division duplex mode and frequency division duplex mode Encourages action on both.

  For example, the arrangement of subframes in a frame of the downlink frequency band may correspond to the arrangement of subframes designated for uplink communication in a frame configured according to the first configuration of the LTE TDD standard. For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in a frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , May correspond to an arrangement of subframes designated for uplink communication in a frame configured according to configuration 1 of the LTE TDD standard. Referring back to FIG. 8, according to this aspect, the downlink frequency band is adapted to correspond to the arrangement of subframes designated for uplink communication in a frame configured according to the second configuration of the LTE TDD standard. By changing the arrangement of subframes in the frame, it is possible to cause the first device to change the number of subframes of the frame in the downlink frequency band. For example, referring to the LTE TDD standard in the diagram 500 shown in FIG. 5, the arrangement of subframes in a frame of the downlink frequency band is subframe 2 in total of one subframe. Configuration 5 of the LTE TDD standard It may be modified to correspond to the arrangement of subframes designated for uplink communication in frames configured according to.

  In some cases, the first device may be an access point, Node B, evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio It may be configured to perform at least one function of a router, a basic service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, and so on.

  Returning to FIG. 8, in some cases, at operation 808, it is possible to cause the first device to determine an increase in the load of the first device. According to this aspect, by reducing the number of subframes of the frame of the downlink frequency band in response to the increase of the load of the first device, the subframe of the frame of the downlink frequency band is transmitted to the first device. It is possible to change the number (operation 806).

  For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in the frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , Subframes 2 and 7, a total of two subframes, corresponding to the arrangement of subframes designated for uplink communication in a frame configured according to LTE TDD standard configuration 1, Reducing the number of subframes of a frame of the downlink frequency band to the first device by changing the arrangement of subframes designated for uplink communication in the frame, as configured according to configuration 2 Is possible. The purpose of reducing the number of subframes refraining from transmitting from 4 (for example, configuration 1 of the LTE TDD standard) to 2 (for example, configuration 2 of the LTE TDD standard) is to meet the increase in the load of the first device Enables more subframes to be used for transmission. In this described example, the change from configuration 1 of the LTE TDD standard to configuration 2 of the LTE TDD standard results in four subframes designated for downlink communication (e.g. subframes 0, 4,. 5 and 9) to 6 (e.g. subframes 0, 3, 4, 5, 8 and 9), so that more to transmit for the purpose of meeting the increased load of the first device Subframes become available.

  In some cases, it is possible for the first device to reduce the number of subframes in the downlink frequency band frame to zero (operation 806), such that all subframes in the downlink frequency band are framed. May be used for transmission. In this situation, none of the LTE TDD standard configurations have zero subframes designated for uplink communication, so the arrangement of subframes in the downlink frequency band frame is a frame configured according to the LTE TDD standard It does not correspond to the arrangement of subframes designated for uplink communication within.

  Those skilled in the art will appreciate that, by way of example and not limitation, non-transitory computer readable storage medium may include at least one instruction for causing an electronic processor to perform operation 808.

  Returning to FIG. 8, in some cases, at operation 810, it is possible to cause the first device to determine a reduction in the load of the first device. According to this aspect, by increasing the number of subframes of the frame of the downlink frequency band according to the reduction of the load of the first device, the subframe of the frame of the downlink frequency band is transmitted to the first device. It is possible to change the number (operation 806).

  For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in the frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , Subframes 2, 3, 4, 7, 8, and 9, for a total of six subframes, corresponding to the arrangement of subframes designated for uplink communication in a frame configured according to LTE TDD standard configuration 1. A frame in the downlink frequency band for the first device by changing the placement of subframes designated for uplink communication in the frame, as configured according to configuration 0 of the LTE TDD standard, which is a subframe. It is possible to increase the number of subframes of Increasing the number of subframes to refrain from transmitting from 4 (eg, LTE TDD standard configuration 1) to 6 (eg, LTE TDD standard configuration 0) may result in more subframes to monitor radar transmissions. Allow to be used. In this described example, the change from configuration 1 of the LTE TDD standard to configuration 0 of the LTE TDD standard results in four subframes designated for uplink communication (e.g. 7 and 8) to 6 (eg, subframes 2, 3, 4, 7, 8 and 9), so that more subframes are available to monitor radar transmission.

  Those skilled in the art will appreciate that, by way of example and not limitation, non-transitory computer readable storage medium may include at least one instruction for causing an electronic processor to perform operation 810.

  Returning to FIG. 8, in some cases, at operation 812, the first device can be made to receive a second signal from another device. The second signal may relate to detection of radar transmission. According to this aspect, it is possible to cause the first device to change the number of subframes of the frame of the downlink frequency band in response to the reception of the second signal (operation 806). In some cases, causing the first apparatus to change the number of subframes in the downlink frequency band by increasing the number of subframes in the downlink frequency band in response to receiving the second signal. (Operation 806) is possible.

  For example, referring to the LTE TDD standard of the diagram 500 shown in FIG. 5, the arrangement of subframes in the frame of the downlink frequency band is subframes 2, 3, 7, and 8, for a total of four subframes , Subframes 2, 3, 4, 7, 8, and 9, for a total of six subframes, corresponding to the arrangement of subframes designated for uplink communication in a frame configured according to LTE TDD standard configuration 1. By changing the arrangement of subframes designated for uplink communication in the frame to be configured according to configuration 0 of the LTE TDD standard, which is a subframe, the first device of the second signal Depending on the reception, it is possible to increase the number of subframes of the frame of the downlink frequency band. Increasing the number of subframes refraining from transmitting from 4 (for example, configuration 1 of the LTE TDD standard) to 6 (for example, configuration 0 of the LTE TDD standard) is from the perspective of the reception of the second signal Fewer subframes are used to allow more subframes to be used to monitor radar transmission. In this described example, the change from configuration 1 of the LTE TDD standard to configuration 0 of the LTE TDD standard results in four subframes designated for uplink communication (e.g. 7, and 8) to 6 (eg, subframes 2, 3, 4, 7, 8, and 9), so that more subframes become available to monitor radar transmission, and the result Reduce the number of subframes designated for downlink communication from 4 (eg, subframes 0, 4, 5, and 9) to 2 (eg, subframes 0 and 5), and thus transmit Because less subframes are available, the probability of interference with radar transmission is reduced.

  Alternatively, the second signal may cause the first device 306 to change downlink communication to a different channel required by dynamic frequency selection (DFS).

  Those skilled in the art will appreciate that, by way of example and not limitation, non-transitory computer readable storage medium may include at least one instruction for causing an electronic processor to perform operation 812.

  Returning to FIG. 8, in some cases, causing the first device to send the first signal to the other device (act 804) may be responsive to the number of subframes being less than a threshold. For example, referring to the LTE TDD standard of diagram 500 shown in FIG. 5, the threshold for the number of subframes in a frame of the downlink frequency band to refrain from transmitting is 2, and within the frame of the downlink frequency band Designated for uplink communication in a frame configured according to configuration 5 of the LTE TDD standard, where the placement of the subframes of is 2 subframes, ie, 1 subframe where the sum is less than the threshold (1) causing the first device to send the first signal to another device in response to the number of subframes being less than the threshold value, when changing to correspond to the arrangement of the selected subframes ( Operation 804) is possible. As described above, such a situation may increase the load on the first device, which may be configured to reduce the number of subframes in order to change the number of subframes. May occur depending on

  In some cases, where the other device is at least one access terminal, the first signal may be configured to cause the at least one access terminal to be designated to monitor radar transmissions. In this situation, monitoring the radar transmission may be performed by both the first device and the at least one access terminal, or may be performed by only the at least one access terminal. Where at least one access terminal includes more than one access terminal, monitoring the radar transmission may include one or more of the access terminals, including one, some or all of the access terminals. Can be performed by

  In some cases, another device may be an access point, Node B, Evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router The first signal is configured to perform at least one function of: a basic service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, etc. The other device may be configured to request the other device to send a second signal to the first device in response to detecting the radar transmission. The first apparatus may be configured to increase the number of subframes in response to receiving the second signal to change the number of subframes. Alternatively, the second signal may cause the first device to change downlink communication to a different channel required by dynamic frequency selection (DFS).

  FIG. 9 may be incorporated into apparatus 902, apparatus 904, and apparatus 906 (eg, corresponding to, for example, an access terminal, access point, and network entity, respectively) to support the radar detection operations taught herein. 2 shows some exemplary components (represented by corresponding blocks). It will be appreciated that these components may be implemented in various types of devices (eg, in ASICs, SoCs, etc.) in various implementations. The components to be described can also be incorporated into other devices in the communication system. For example, other devices in the system may include components similar to those described to provide similar functionality. Also, a given device may include one or more of the described components. For example, the device may include multiple transceiver components that allow the device to operate on multiple carriers and / or communicate via different technologies.

  Apparatus 902 and apparatus 904 are each for communicating with other nodes via at least one designated wireless access technology (respectively communication device 908 and 914 (and communication device 920 if device 904 is a relay) And at least one wireless communication device. Each communication device 908 transmits at least one transmitter (represented by transmitter 910) for transmitting and encoding signals (eg, messages, indications, information, etc.) and signals (eg, messages, indications, information) , At least one receiver (represented by receiver 912) for receiving and decoding, etc.). Similarly, each communication device 914 includes at least one transmitter (represented by transmitter 916) for transmitting signals (eg, messages, indications, information, pilots, etc.), and signals (eg, messages, indications) , At least one receiver (represented by receiver 918) for receiving information, etc.). If apparatus 904 is a relay access point, each communication device 920 can transmit at least one transmitter (represented by transmitter 922) for transmitting signals (eg, messages, indications, information, pilots, etc.); And at least one receiver (represented by receiver 924) for receiving signals (eg, messages, indications, information, etc.).

  The transmitter and receiver may include integrated devices (eg, implemented as transmitter circuitry and receiver circuitry of a single communication device) in some implementations, or in some implementations , An independent transmitter device and an independent receiver device may be included, or in other implementations may be implemented in other manners. In some aspects, the wireless communication device (eg, one of the plurality of wireless communication devices) of the apparatus 904 includes a network listen module.

  Device 906 (and device 904 if device 904 is not a relay access point) includes at least one communication device (represented by communication device 926 and possibly 920) to communicate with other nodes . For example, communication device 926 may include a network interface configured to communicate with one or more network entities via a wired based or wireless backhaul. In some aspects, communication device 926 may be implemented as a transceiver configured to support wired or wireless signal communication. This communication may, for example, relate to sending and receiving messages, parameters, or other types of information. Thus, in the example of FIG. 9, communication device 926 is illustrated as including transmitter 928 and receiver 930. Similarly, if device 904 is not a relay access point, communication device 920 may include a network interface configured to communicate with one or more network entities via a wired based or wireless backhaul. Similar to communication device 926, communication device 920 is illustrated as including transmitter 922 and receiver 924.

  Devices 902, 904, and 906 also include other components that may be used in conjunction with the radar detection operations taught herein. The apparatus 902 includes, for example, a processing system 932 for providing the functionality for radar detection taught herein and for providing other processing functionality. The apparatus 904 includes, for example, a processing system 934 for providing the functionality for radar detection taught herein and for providing other processing functionality. Apparatus 906 includes, for example, processing system 936 for providing the functionality for radar detection taught herein and for providing other processing functions. Devices 902, 904, and 906 may each include memory devices 938, 940, and 942 (eg, each memory device for maintaining information (eg, information indicating reserved resources, thresholds, parameters, etc.)). Including). In addition, devices 902, 904, and 906 can each provide a display (eg, audible and / or visual display) to the user and / or (eg, user sensing devices such as a keypad, touch screen, microphone, etc.) User interface devices 944, 946, and 948 for receiving user input.

  For convenience, the device 902 is shown in FIG. 9 as including components that may be used in the various examples described herein. In fact, the blocks shown may have different functions in various aspects. For example, the functionality of block 934 to support operations 808 and / or 810 of FIG. 8 may be different than the functionality of block 934 to support operation 812 of FIG.

  The components of FIG. 9 may be implemented in various manners. In some implementations, the components of FIG. 9 may be one or more circuits, such as, for example, one or more processors and / or one or more ASICs (which may include one or more processors). Can be implemented in Here, each circuit may use and / or incorporate at least one memory component for storing information or executable code used by the circuit providing this function. For example, some or all of the functions represented by blocks 908, 932, 938 and 944 may be performed by the processor and memory components of device 902 (eg, by execution of appropriate code and / or processor components) Can be implemented by appropriate configuration). Similarly, some or all of the functions represented by blocks 914, 920, 934, 940, and 946 may be performed by the processor and memory components of device 904 (eg, by execution of appropriate code and / or processor Can be implemented by appropriate configuration of components). Also, some or all of the functions represented by blocks 926, 936, 942, and 948 may be performed by the processor and memory components of device 906 (eg, by execution of appropriate code and / or of processor components Can be implemented by appropriate configuration).

  As mentioned above, some of the access points mentioned herein may include small cell access points. As used herein, the term small cell access point refers to the transmit power (eg, maximum transmit power, instantaneous transmit power, nominal) less than the transmit power (eg, as defined above) of any macro access point within the coverage area. An access point having one or more of: transmit power, average transmit power, or some other form of transmit power). In some implementations, each small cell access point has a relative margin (e.g., 10 dBm or more) less (e.g., defined above) a transmit power than the macro access point (e.g., defined above) Have. In some implementations, small cell access points, such as femtocells, may have a maximum transmit power of 20 dBm or less. In some implementations, small cell access points, such as pico cells, may have a maximum transmit power of 24 dBm or less. However, these or other types of small cell access points may, in other implementations, have higher or lower maximum transmit powers (eg, up to 1 watt in some cases, up to 10 watts in some cases, etc.) It will be appreciated that it may have.

  Typically, the small cell access point is via a broadband connection (eg, digital subscriber line (DSL) router, cable modem, or some other type of modem) that provides a backhaul link to the mobile operator's network. Connect to the Internet. Thus, small cell access points deployed for the user's home or commerce provide mobile network access to one or more devices via a broadband connection.

  Small cells may be configured to support various types of access modes. For example, in the open access mode, the small cell may allow any access terminal to obtain any type of service via the small cell. In restricted (or closed) access mode, the small cell may allow only authorized access terminals to obtain service via the small cell. For example, a small cell may allow only access terminals (eg, so-called home access terminals) belonging to a certain subscriber group (eg, limited subscriber group (CSG)) to obtain service via the small cell. . In the hybrid access mode, disparate access terminals (e.g., non-home access terminals, non-CSG access terminals) may be given limited access to small cells. For example, a macro access terminal not belonging to the CSG of the small cell is permitted to access the small cell only when sufficient resources are available to all home access terminals currently served by the small cell It can be done.

  Thus, small cells operating in one or more of these access modes may be used to provide indoor coverage and / or extended outdoor coverage. By enabling access to the user by adopting the desired access mode of operation, the small cell provides improved service within the coverage area and in some cases extends the service coverage area to users of the macro network be able to.

  Thus, in some aspects, the teachings herein provide coverage on a large scale (eg, a wide area cellular network such as a 3G network, commonly referred to as a macro cell network or wide area network (WAN)) and smaller scale coverage. It may be employed within a network, including, for example, a residential or building based network environment, usually referred to as a local area network (LAN). As the access terminal moves through such a network, the access terminal may be serviced by the access point providing macro coverage in some locations, while the access terminal may have smaller coverage in other locations. It may be serviced by the access point it provides. In some aspects, smaller coverage nodes may be used to provide incremental capacity growth, indoor coverage, and different services (eg, for a more robust user experience).

  In the description herein, a node providing coverage over a relatively large area (eg, an access point) may be referred to as a macro access point, and a node providing coverage over a relatively small area (eg, a home) is small Sometimes called a cell. It will be appreciated that the teachings herein may be applicable to nodes associated with various types of coverage areas. For example, a pico access point may provide coverage (eg, coverage within a commercial building) over an area that is smaller than the macro area and larger than the femtocell area. Other terms may be used to refer to macro access points, small cells, or other access point type nodes in various applications. For example, a macro access point may be configured or referred to as an access node, base station, access point, eNodeB, macro cell, etc. In some implementations, a node may be associated with (e.g., so called or divided into) one or more cells or sectors. The cells or sectors associated with macro access points, femto access points, or pico access points, respectively, may be referred to as macro cells, femto cells, or pico cells.

  FIG. 10 shows a wireless communication system 1000 configured to support a number of users in which the teachings herein may be implemented. System 1000 provides communication to a plurality of cells 1002, such as, for example, macro cells 1002A-1002G, each cell being served by a corresponding access point 1004 (eg, access points 1004A-1004G). As shown in FIG. 10, access terminals 1006 (e.g., access terminals 1006A-1006L) may be distributed at various locations throughout the system over time. Each access terminal 1006 may, for example, forward link (FL) and / or reverse link (RL) at a given moment depending on whether access terminal 1006 is active and in soft handoff. It may be in communication with the one or more access points 1004 above. The wireless communication system 1000 can provide services over a wide geographical area. For example, macro cells 1002A-1002G may cover several blocks in the vicinity, or several miles in a local environment.

  FIG. 11 shows an example of a communication system 1100 in which one or more small cells are deployed in a network environment. Specifically, system 1100 includes a plurality of small cells 1110 (eg, small cells 1110A and 1110B) installed within a relatively small scale network environment (eg, within one or more user residences 1130). Including. Each small cell 1110 may be coupled to a wide area network 1140 (eg, the Internet) and a cellular operator core network 1150 via a DSL router, cable modem, wireless link, or other connection means (not shown). As discussed below, each small cell 1110 may be associated with an associated access terminal 1120 (eg, access terminal 1120A) and, optionally, another (eg, hybrid or disparate) access terminal 1120 (eg, access terminal 1120B). Can be configured to service the In other words, access to the small cell 1110 may be such that a given access terminal 1120 may be served by a set of designated (eg, home) small cells 1110 but any non-designated small cells 1110 (eg, It can be restricted so that it can not be serviced by a nearby small cell 1110).

  FIG. 12 shows an example of a coverage map 1200 in which several tracking areas 1202 (or routing areas or location areas) each including several macro coverage areas 1204 are defined. Here, the coverage areas associated with tracking areas 1202A, 1202B, and 1202C are delineated by thick lines, and macro coverage areas 1204 are represented by relatively large hexagons. Tracking area 1202 also includes small cell coverage area 1206. In this example, each of the small cell coverage areas 1206 (eg, small cell coverage areas 1206 B and 1206 C) is shown in one or more macro coverage areas 1204 (eg, macro coverage areas 1204 A and 1204 B). However, it will be appreciated that some or all of the small cell coverage area 1206 may not be within the macro coverage area 1204. In practice, a large number of small cell coverage areas 1206 (eg, small cell coverage areas 1206A and 1206D) may be defined within a given tracking area 1202 or macro coverage area 1204.

  Referring again to FIG. 11, the owner of the small cell 1110 can subscribe to mobile services, such as, for example, 3G mobile services or 4G mobile services provided via the mobile operator core network 1150. In addition, access terminal 1120 may be configured to operate both in macro environments and in smaller (eg, residential) network environments. In other words, depending on the current location of access terminal 1120, access terminal 1120 may be a macrocell access point 1160 associated with mobile operator core network 1150, or a set of small cells 1110 (eg, a corresponding user's residence) It may be served by any one of the small cells 1110A and 1110B) present in 1130. For example, when the subscriber is outside the home, the subscriber is served by a standard macro access point (eg, access point 1160) and when the subscriber is at home, the subscriber may be in the small cell (eg, It is served by a small cell 1110A). Here, the small cell 1110 may be backward compatible with the legacy access terminal 1120.

  The small cells 1110 may be deployed on a single frequency or, alternatively, on multiple frequencies. Depending on the particular configuration, one or more of a single frequency or multiple frequencies may overlap with one or more frequencies used by the macro access point (eg, access point 1160).

  In some aspects, access terminal 1120 may be configured to connect to a preferred small cell (eg, a home small cell of access terminal 1120) whenever such a connection is possible. For example, whenever access terminal 1120A is within a user's residence 1130, it may be desirable for access terminal 1120A to communicate only with home small cell 1110A or 1110B.

  In some aspects, if access terminal 1120 operates within macro cellular network 1150 but is not on its most preferred network (e.g., as defined in the preferred roaming list), then access terminal 1120 is more likely to Use a better system reselection (BSR) procedure that can determine if a good system is currently available and subsequently include periodic scans of the available systems to obtain such a preferred system. Thus, the search for the most desirable network (eg, preferred small cell 1110) can be continued. Access terminal 1120 may limit the search for particular bands and channels. For example, one or more small cell channels may be defined such that all small cells (or all restricted small cells) in the region operate on the small cell channel. The search for the most preferred system can be repeated periodically. Upon discovering the preferred small cell 1110, the access terminal 1120 selects the small cell 1110 and, when within its coverage area, registers on the access terminal 1120 for use.

  In some aspects, access to small cells may be restricted. For example, a given small cell can only provide some services to some access terminals. In deployments with so-called restricted (or restricted) access, a given access terminal may be a macrocell mobile network and a defined set of small cells (eg, small cells 1110 present in corresponding user's residences 1130). Can only be serviced). In some implementations, the access point may be limited to not provide at least one of signaling, data access, registration, query, or service to at least one node (eg, an access terminal).

  In some aspects, a restricted small cell (sometimes called a Restricted Subscriber Group Home Node B) is a small cell that provides service for a restricted provisioned set of access terminals. This set may be temporarily or permanently extended as needed. In some aspects, a limited subscriber group (CSG) can be defined as a set of access points (eg, small cells) that share a common access control list of access terminals.

  Such various relationships may exist between a given small cell and a given access terminal. For example, from the perspective of an access terminal, an open small cell may refer to a small cell for which access is not restricted (eg, a small cell allows access to any access terminal). Restricted small cells may refer to small cells that are restricted in some manner (e.g., restricted with respect to access and / or registration). A home small cell may refer to a small cell that an access terminal is authorized to access and operate (eg, providing a defined access to one or more access terminals with permanent access). A hybrid (or guest) small cell may refer to a small cell where different levels of service are provided to different access terminals (e.g. some access terminals allow partial and / or temporary access) However, other access terminals may be allowed full access). Heterogeneous small cells may refer to small cells that the access terminal is not permitted to access or operate, except possibly in emergency situations (e.g., 911 calls).

  From the point of view of a restricted small cell, a home access terminal may refer to an access terminal that is permitted to access a restricted small cell installed in the home of the owner of the access terminal (usually, the home access terminal is , With permanent access to its small cell). A guest access terminal may refer to an access terminal that has temporary access to a small cell that is restricted (eg, restricted based on deadlines, hours used, bytes, connection count, or some other criteria). is there. An access terminal that does not have permission to access the restricted small cell (eg, an access terminal that does not have the credential or permission to register in the restricted small cell, perhaps except for emergency situations, eg, 911 calls, etc.) May point to).

  The teachings herein may be employed in a wireless multiple access communication system simultaneously supporting communication of multiple wireless access terminals. Here, each terminal may communicate with one or more access points via transmissions on forward and reverse links. The forward link (or downlink) refers to the communication link from the access point to the terminal, and the reverse link (or uplink) refers to the communication link from the terminal to the access point. This communication link may be established via a single-in-single-out system, a multiple-in-multiple-out (MIMO) system, or some other type of system.

  A MIMO system employs multiple (NT) transmit antennas and multiple (NR) receive antennas for data transmission. A MIMO channel formed by NT transmit antennas and NR receive antennas can be decomposed into NS independent channels, also called spatial channels, with NS ≦ min {NT, NR}. Each of the N S independent channels corresponds to one dimension. A MIMO system may provide improved performance (eg, higher throughput and / or greater reliability) if the additional dimensionality generated by multiple transmit antennas and multiple receive antennas is utilized.

  A MIMO system may support time division duplex (TDD) and frequency division duplex (FDD). In a TDD system, since the forward link transmission and the reverse link transmission are performed on the same frequency region, reciprocity theorem allows estimation of the forward link channel from the reverse link channel. This allows the access point to extract transmit beamforming gain on the forward link when multiple antennas are available at the access point.

  FIG. 13 shows a wireless device 1310 (eg, access point) and a wireless device 1350 (eg, access terminal) of an exemplary MIMO system 1300. At the device 1310, traffic data for several data streams is provided from a data source 1312 to a transmit (TX) data processor 1314. Each data stream may then be transmitted via a respective transmit antenna.

  TX data processor 1314 formats, codes, and interleaves traffic data for each data stream based on the particular coding scheme selected for that data stream to provide coded data. The data encoded for each data stream may be multiplexed with pilot data using OFDM techniques. The pilot data is generally a known data pattern that is processed in a known manner and can be used at the receiver system to estimate channel response. The multiplexed pilots and data encoded for each data stream are then selected for the particular modulation scheme (eg, BPSK, QSPK, M-PSK, or M) selected for that data stream to provide modulation symbols. Modulated (ie, symbol mapped) based on The data rate, coding, and modulation for each data stream may be determined by instructions executed by processor 1330. Data memory 1332 may store program codes, data, and other information used by processor 1330 or other components of device 1310.

  The modulation symbols for all data streams are then provided to a TX MIMO processor 1320, which may further process the modulation symbols (eg, for OFDM). TX MIMO processor 1320 then provides NT modulation symbol streams to NT transceivers (XCVR) 1322A through 1322T. In some aspects, TX MIMO processor 1320 applies beamforming weights to the symbols of the data streams and to the antenna from which the symbol is being transmitted.

  Each transceiver 1322 receives and processes its respective symbol stream to provide one or more analog signals, and further conditions (eg, amplifies, filters, and upconverts) the analog signals to provide MIMO Provide a modulated signal suitable for transmission over a channel. Then, N T modulated signals from transceivers 1322A through 1322T are transmitted from N T antennas 1324A through 1324T, respectively.

  At device 1350, the transmitted modulated signals are received by N R antennas 1352A through 1352R and the signal received from each antenna 1352 is provided to a respective transceiver (XCVR) 1354A through 1354R. Each transceiver 1354 conditions (eg, filters, amplifies, and downconverts) its respective received signal, digitizes the conditioned signal to provide samples, and processes the samples to corresponding Provide a "received" symbol stream.

  Receive (RX) data processor 1360 may then receive NR received symbols from NR transceivers 1354 based on a particular receiver processing technique to provide NT “detected” symbol streams. Receive and process streams. RX data processor 1360 then demodulates, deinterleaves, and decodes each detected symbol stream to recover traffic data for the data stream. The processing by RX data processor 1360 is complementary to the processing performed by TX MIMO processor 1320 and TX data processor 1314 at device 1310.

  A processor 1370 periodically determines which precoding matrix to use (discussed below). Processor 1370 organizes reverse link messages that include a matrix index portion and a rank value portion. Data memory 1372 may store program code, data, and other information used by processor 1370 or other components of device 1350.

  The reverse link message may include various types of information regarding the communication link and / or the received data stream. The reverse link message is then processed by a TX data processor 1338 that also receives some data stream traffic data from a data source 1336, modulated by a modulator 1380 and conditioned by transceivers 1354A through 1354R, device 1310 Sent back to.

  At device 1310, the modulated signal from device 1350 is received by antenna 1324, conditioned by transceiver 1322, demodulated by demodulator (DEMOD) 1340, processed by RX data processor 1342, and transmitted by device 1350 Extract reverse link message. Processor 1330 then determines which precoding matrix to use to determine the beamforming weights, and then processes the extracted message.

  FIG. 13 also shows that the communication component may include one or more components that perform the radar detection operation as taught herein. For example, radar control component 1390 can cooperate with processor 1330 and / or other components of device 1310 to detect radar, as taught herein. Similarly, radar control component 1392 may cooperate with processor 1370 and / or other components of device 1350 to detect radar as taught herein. It will be appreciated that for each of the devices 1310 and 1350, the functionality of more than one of the described components may be provided by a single component. For example, a single processing component can provide the functionality of radar control component 1390 and processor 1330, and a single processing component can provide the functionality of radar control component 1392 and processor 1370. Can.

The teachings herein may be incorporated into various types of communication systems and / or system components. In some aspects, the teachings herein may be by sharing available system resources (eg, by specifying one or more of bandwidth, transmit power, coding, interleaving, etc.) It may be employed in a multiple access system that can support communication with multiple users. For example, the teachings herein may include the following techniques: Code Division Multiple Access (CDMA) systems, Multiple Carrier CDMA (MCCDMA), Wideband CDMA (W-CDMA), High Speed Packet Access (HSPA, HSPA +) systems, Division Multiple Access (TDMA) system, Frequency Division Multiple Access (FDMA) system, Single Carrier FDMA (SC-FDMA) system, Orthogonal Frequency Division Multiple Access (OFDMA) system, or any one or a combination of other multiple access techniques Can be applied to Wireless communication systems that employ the teachings herein may be designed to implement one or more standards, such as IS-95, cdma2000, IS-856, W-CDMA, TDSCDMA, and other standards. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, or some other technology. UTRA includes W-CDMA and low chip rate (LCR). cdma2000 technology covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as the Global System for Mobile Communications (GSM). An OFDMA network may implement a radio technology such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDM (registered trademark). UTRA, E-UTRA, and GSM (registered trademark) are parts of Universal Mobile Telecommunications System (UMTS). The teachings herein may be implemented in 3GPP Long Term Evolution (LTE) systems, Ultra Mobile Broadband (UMB) systems, and other types of systems. LTE is a release of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM (registered trademark), UMTS, and LTE are described in documents of an organization named "3rd Generation Partnership Project" (3GPP), cdma2000 is described in "3rd Generation Partnership Project 2 "(3GPP2)" is described in the document of the organization. Although some aspects of the present disclosure may be described using 3GPP terms, the teachings herein may be applied to 3GPP (eg, Rel99, Rel5, Rel6, Rel7) technology, as well as 3GPP2 (eg, 1xRTT, 1xEV-). It should be understood that it can be applied to DO Relo, RevA, RevB) techniques, and other techniques.

  The teachings herein may be incorporated into (e.g., implemented in or performed by) various devices (e.g., nodes). In some aspects, a node (eg, a wireless node) implemented in accordance with the teachings herein may include an access point or access terminal.

  For example, the access terminal may contain or include user equipment, subscriber stations, subscriber units, mobile stations, mobiles, mobile nodes, remote stations, remote terminals, user terminals, user agents, user devices, or some other terminology. Or may be known as any of them. In some implementations, the access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (SIP) telephone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless connectivity, or wireless It may include any other suitable processing device connected to a modem. Thus, one or more aspects taught herein include a telephone (eg, a cell phone or smartphone), a computer (eg, a laptop), a tablet, a portable communication device, a portable computing device (eg, a personal digital assistant) ), Entertainment devices (eg, music devices, video devices, or satellite radios), global positioning system devices, or any other suitable device configured to communicate via a wireless medium.

  The access point includes Node B, e Node B, radio network controller (RNC), base station (BS), radio base station (RBS), base station controller (BSC), transceiver base station (BTS), transceiver function ( TF), wireless transceiver, wireless router, basic service set (BSS), extended service set (ESS), macro cell, macro node, home eNB (HeNB), femto cell, femto node, pico node, or some other similar term And may be implemented as or any of them.

  In some aspects, a node (eg, an access point) may include an access node for a communication system. For example, such an access node may provide a connection for or to a network (eg, a wide area network such as the Internet or a cellular network) via a wired or wireless communication link to the network. . Thus, an access node may enable another node (e.g., an access terminal) to access a network or some other functionality. In addition, it will be appreciated that one or both of the nodes may be portable or, in some cases, relatively non-portable.

  Also, it will be appreciated that the wireless node may be capable of transmitting and / or receiving information in a non-wireless manner (eg, via a wired connection). Thus, the receivers and transmitters discussed herein may include appropriate communication interface components (eg, electrical or optical interface components) to communicate via non-wireless media.

  A wireless node may communicate via one or more wireless communication links based on, or in some cases, supporting, any suitable wireless communication technology. For example, in some aspects a wireless node may be associated with a network. In some aspects, the network may include a local area network or a wide area network. The wireless device may support one or more of the various wireless communication technologies, protocols, or standards (eg, CDMA, TDMA, OFDM, OFDMA, WiMAX, Wi-Fi, etc.) discussed herein, or May, in some cases, be used. Similarly, the wireless node may support or otherwise use one or more of a variety of corresponding modulation or multiplexing schemes. Thus, the wireless node may include components (e.g., an air interface) suitable for establishing one or more wireless communication links and communicating thereover using the above or other wireless communication techniques. . For example, a wireless node may have a wireless transceiver with associated transmitter and receiver components that may include various components (eg, signal generator and signal processor) that facilitate communication via a wireless medium. May be included.

  The features described herein (eg, with respect to one or more of the accompanying drawings) may, in some aspects, correspond to similarly designated "means" features in the attached claims. obtain.

  Referring to FIG. 14, apparatus 1400 is represented as a series of interrelated functional modules. A first device configured to communicate with other devices in a wireless network and operating in frequency division duplex mode, for a number of subframes of a frame in the downlink frequency band, prior to detection of radar transmission. The module 1402 for refraining from sending may, in at least some aspects, correspond to, for example, a switch as discussed herein. A module 1404 for causing a first device to send a first signal to a second device may correspond at least in some aspects to, for example, a transmitter as discussed herein. A module 1406 for causing the first apparatus to change the number of subframes of a frame in the downlink frequency band in response to an event may correspond to, for example, the circuits discussed herein, in at least some aspects. . The module 1408 for causing the first device to determine an increase in the load of the first device may, in at least some aspects, correspond to, for example, the circuits discussed herein. The module 1410 for causing the first device to determine the reduction in load of the first device may correspond, for example, to the circuits discussed herein, in at least some aspects. A module 1412 for causing a first device to receive a second signal from a second device may correspond at least in some aspects, for example, to the circuits discussed herein.

  The functionality of the modules of FIG. 14 may be implemented in various ways not inconsistent with the teachings herein. In some aspects, the functionality of these modules may be implemented as one or more electrical components. In some aspects, the functionality of these blocks may be implemented as a processing system that includes one or more processor components. In some aspects, the functionality of these modules may be implemented using, for example, at least a portion of one or more integrated circuits (eg, an ASIC). As described herein, an integrated circuit may include a processor, software, other related components, or some combination thereof. Thus, the functionality of the different modules may be implemented, for example, as various subsets of integrated circuits, various subsets of sets of software modules, or combinations thereof. Those skilled in the art will also appreciate that a given subset (e.g., of an integrated circuit and / or of a set of software modules) may provide at least a portion of the functionality for more than one module. As one specific example, apparatus 1400 may include a single device (eg, components 1402 to 1412 that include various sections of an ASIC). As another specific example, apparatus 1400 includes several devices (eg, component 1402 that includes one ASIC, component 1404 that includes another ASIC, and components 1406 to 1412 that includes yet another ASIC) obtain. The functionality of these modules may also be implemented in some other manner as taught herein. In some aspects, one or more of any dashed blocks in FIG. 14 are optional.

  In addition, the components and functions represented by FIG. 14, as well as the other components and functions described herein, may be implemented using any suitable means. Such means may also be implemented, at least in part, using corresponding structures as taught herein. For example, the components described above in conjunction with the "modules for" components of FIG. 14 may correspond to "means for" functions also designated. Thus, in some aspects, one or more of such means employ one or more of a processor component, an integrated circuit, or any other suitable structure taught herein. Can be implemented.

  In some aspects, the device or any component of the device may be configured (or operable or adapted) to provide the functionality taught herein. This may be done, for example, by programming the device or component to provide a function, such as by manufacturing (eg, making) the device or component to provide the function, or some other suitable It can be achieved through the use of implementation techniques. As an example, integrated circuits can be fabricated to provide the necessary functionality. As another example, an integrated circuit may be fabricated to support the required functionality and then configured (eg, via programming) to provide the required functionality. As another example, processor circuitry may execute code to provide the required functionality.

  Additionally, any of the various exemplary logic blocks, modules, processors, means, circuits, and algorithm operations described with respect to the aspects disclosed herein may be implemented as electronic hardware (e.g., source coding or some other technique). Digital implementation, analog implementation, or a combination of the two, which can be designed, various forms of program or design code incorporating instructions (for convenience, referred to herein as “software” or “software module” Those skilled in the art will appreciate that it may be implemented as a combination of the two). To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits and operations are described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the integrated system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

  The various exemplary logic blocks, modules, and circuits described with respect to the aspects disclosed herein may be implemented within or in a processing system, integrated circuit ("IC"), access terminal, or access point Can be implemented by The processing system may be implemented using one or more ICs, or may be implemented within the ICs (e.g., as part of a system on chip). ICs may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, electronic It may include components, optical components, mechanical components, or any combination thereof designed to perform the functions described herein, inside the IC, outside the IC, or It can execute code or instructions present in both. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors associated with a DSP core, or any other such configuration. .

  It should be understood that the specific order or hierarchy of operations within any disclosed process is an example of exemplary approaches. It should be understood that, based on design preferences, the particular order or hierarchy of operations within a process may be reconfigured without departing from the scope of the present disclosure. The accompanying method claims present elements of the various operations in a sample order, and are not limited to the specific order or hierarchy presented.

  The operations of the methods or algorithms described in connection with the aspects disclosed herein may be implemented directly in hardware, in a software module executed by a processor, or in a combination of the two. Software modules (including, for example, executable instructions and associated data) and other data may be RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROM, or the like. It may reside in memory, such as any other form of computer readable storage medium known in the art. An exemplary storage medium may, for example, be referred to herein as (a "processor," for convenience, as the processor may read information (eg, code) from the storage medium and write information to the storage medium. ) Can be coupled to a machine such as a computer / processor. An exemplary storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in user equipment. In the alternative, the processor and the storage medium may reside as discrete components in user equipment. Further, in some aspects, any suitable computer program product is executable (eg, executable by at least one computer) to provide functionality associated with one or more of the aspects of the present disclosure. Computer readable media. In some aspects, a computer program product may include packaging material.

  In one or more implementations, the functions described may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or read out of computer readable media as one or more instructions or code. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Computer readable media can be any available media that can be accessed by a computer. By way of example and not limitation, such computer readable media may be RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or any desired form of instructions or data structures. It may include any other medium that can be used to carry or store program code and can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, software may use a coaxial cable, fiber optic cable, twisted pair wire, digital subscriber line (DSL), or a web site, server, or other remote using wireless technology such as infrared, wireless, and microwave. When transmitted from a source, coaxial technologies, fiber optic cables, twisted wire pairs, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disc and disc as used herein are compact disc (CD), laser disc, optical disc (disc), digital versatile disc (DVD) , Floppies, and Blu-ray discs, which typically reproduce data magnetically, while discs use a laser to optically read data. To play. Thus, in some aspects computer readable medium may include non-transitory computer readable medium (eg, tangible medium, computer readable storage medium, computer readable storage device, etc.). Such non-transitory computer readable media (e.g., computer readable storage devices) are tangible forms of media described herein or possibly known (e.g., memory devices, media disks, etc.) May be included. In addition, in some aspects computer readable medium may include temporary computer readable medium (eg, include signals). Combinations of the above may also be included within the scope of computer readable media. It will be appreciated that computer readable media may be implemented in any suitable computer program product.

  Furthermore, the methods, sequences, and / or algorithms described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module resides in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. obtain. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to the storage medium. In the alternative, the storage medium may be integral to a processor (eg, cache memory).

  While the foregoing disclosure has described various exemplary aspects, it should be noted that various changes and modifications can be made to the illustrated examples without departing from the scope defined by the appended claims. The present disclosure is not intended to be limited to only the specifically illustrated examples. For example, unless stated otherwise, the functions, acts and / or actions of the method claims in accordance with the aspects of the present disclosure described herein need not be performed in any particular order. Furthermore, while some aspects may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

300 Communication system, system
302 Access terminal
304 Access terminal
306 Access point, device
308 Network Entity
310 radar source
312 radar detector
400 time division duplex configuration, configuration
402 First device
404 transmitter
406 Receiver
408 antenna
410 switch
452 Second device
454 transmitter
456 Receiver
458 antenna
460 switch
A diagram of a predetermined configuration of a frame according to the 500 Long Term Evolution (LTE) Time Division Duplex (TDD) standard
600 frequency division duplex configuration, configuration
602 first device, first wireless device
604 transmitter
606 receiver
608 First antenna
610 Second antenna
652 Second device, second wireless device
654 transmitter
656 receiver
658 first antenna
660 Second antenna
700 wireless network
702 Second device
704 Third device
706 transmitter
708 switch
710 circuit
712 Receiver
902 device
904 devices
906 devices
908 Communication device, block
910 transmitter
912 Receiver
914 Communication device, block
916 transmitter
918 Receiver
920 communication device, block
922 transmitter
924 receiver
926 Communication device, block
928 transmitter
930 receiver
932 Processing system, block
934 processing system, block
936 processing system, block
938 Memory device, block
940 memory device, block
942 Memory device, block
944 User interface device, block
946 User interface device, block
948 User interface device, block
1000 Communication system, system
1002, 1002A to 1002G macro cell
1004, 1004A to 1004G access points
1006, 1006A to 1006L access terminal
1100 communication system, system
1110 small cell
1110A small cell
1110B small cell
1120 Access Terminal, Legacy Access Terminal
1120A Access Terminal
1120B access terminal
1130 user's home
1140 wide area network
1150 Mobile carrier core network, macro cellular network
1160 Macrocell Access Point, Access Point
1200 coverage map
1202 tracking area
1202A Tracking area
1202B tracking area
1202C tracking area
1204 Macro coverage area
1204A Macro coverage area
1204B Macro coverage area
1206 Small Cell Coverage Area
1206A Small Cell Coverage Area
1206B Small Cell Coverage Area
1206C Small Cell Coverage Area
1206D Small Cell Coverage Area
1310 Access terminal
1300 MIMO system
1310 Wireless Devices, Devices
1312 Data Source
1314 Transmit (TX) Data Processor
1320 TX MIMO processor
1322 transceiver
1322A to 1322T transceiver (XCVR)
1324 antenna
1324A to 1324T Antenna
1330 processor, TX MIMO processor
1332 data memory
1336 data source
1338 TX Data Processor
1340 Demodulator (DEMOD)
1342 RX Data Processor
1350 wireless devices, devices
1352 antenna
1352A-1325R Antenna
1354 transceiver
1354A to 1354R transceiver (XCVR)
1360 Receive (RX) Data Processor
1370 processor
1372 Data Memory
1380 Modulator
1390 Radar Control Component
1392 Radar Control Component
1400 devices
1402 A module to refrain from transmitting during some subframes of a frame in the downlink frequency band prior to detection of radar transmission
1404 Module for sending a first signal to a second device
1406 A module for changing the number of subframes of a frame in the downlink frequency band in response to an event
1408 Module for determining the increase of the load of the first device
1410 Module for determining load reduction of the first device
1412 Module for receiving a second signal from a second device

Claims (15)

A method for managing radar detection in a wireless network, comprising:
The first device, configured to communicate with other devices in the wireless network and operating in frequency division duplex mode, of several subframes of a frame of the downlink frequency band prior to detection of radar transmission. Withholding sending in between
The first device is configured to monitor a first signal related to monitoring the radar transmission during the several subframes of the frame of the downlink frequency band. Sending to a second device;
Having the first device receive a second signal from the second device regarding the detection of the radar transmission;
Causing the first device to change the number of sub-frames for which the first device refrains from transmitting , in response to an event , wherein the event is a change in load of the first device, or And D. one or more of the receiving of the second signal.   The first device is an access point, node B, evolved node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic 5. The method of claim 1, wherein the method is configured to perform at least one function of a service set, an enhanced service set, a macro cell, a macro node, a home eNB, a femto cell, a femto node, a pico node, a relay node, or a combination thereof. Method described.   The method of claim 1, wherein the configuration of the first signal conforms to a radio resource control protocol.   The arrangement of subframes in the frame of the downlink frequency band is the arrangement of subframes designated for uplink communication in a frame configured according to the first configuration of the Long Term Evolution Time Division Duplex standard Correspondingly, the step of causing the first device to change the number of sub-frames of the frame of the downlink frequency band may be associated with the first device, a second of the long term evolution time division duplex standard. Changing the arrangement of the subframes in the frame of the downlink frequency band to correspond to the arrangement of subframes designated for uplink communication in a frame configured according to a configuration The method according to Item 1. Further comprising causing the first device to determine an increase in the load of the first device, the event being the increase in the load, causing the first device to change the number of subframes wherein the step of, in said first device, a step of reducing the number of previous SL subframe Ru refrain from the transmission method of claim 1.   6. The method of claim 5, wherein the step of causing the first device to reduce the number of sub-frames is causing the first device to reduce the number of sub-frames to zero. Further comprising causing the first device to determine a reduction in the load of the first device, the event being the reduction of the load, causing the first device to change the number of subframes wherein the step of, in said first device, a step of increasing the number of the previous SL subframe Ru refrain from the transmission method of claim 1. Said step of changing the number of the sub-frame to the first device, the first device, a step of increasing the number of the previous SL subframe Ru refrain from the transmission method of claim 7 .   The method according to claim 1, wherein the step of causing the first device to send the first signal to the second device is performed in response to the number of subframes being less than a threshold. .   The method according to claim 1, wherein the arrangement of the subframes in the frame of the downlink frequency band corresponds to the arrangement of subframes designated for transmission according to Multimedia Broadcast Multicast Service specification. The second device is at least one access terminal and the first signal is configured to cause the at least one access terminal to monitor the radar transmission, or the second device is an access point, Node B, evolved Node B, radio network controller, base station, radio base station, base station controller, transceiver base station, transceiver function, radio transceiver, radio router, basic service set, extended service set, macro cell, macro Configured to perform at least one function of a node, a home eNB, a femtocell, a femto node, a pico node, a relay node, or a combination thereof, wherein the first signal is transmitted from the second device to the radar Requesting the second device to send a second signal to the first device in response to detecting a transmission; Configured to,
The method of claim 1. A first apparatus for managing radar detection in a wireless network, comprising:
The first device configured to communicate with other devices in the wireless network and operating in frequency division duplex mode, prior to detection of radar transmission, some subframes of a frame of the downlink frequency band Means to refrain from sending during
The first device configured to monitor a first signal related to monitoring the radar transmission during the several subframes of a frame of the downlink frequency band; Means for sending to device 2;
Means for causing the first device to receive a second signal related to the detection of the radar transmission from the second device;
The number of previous SL subframe the first device Ru refrain from the transmission, and means for changing the first device in response to an event, the event, the load of the first device A means for changing which is one or more of: change of, or reception of the second signal. The number of previous SL subframe transmitting Ru ahead is, in response to said increase in the load of the first device is increased in accordance with reduction of the reduction by or the load of the first device, A first device according to claim 12. Means for causing the first device to receive a second signal from the second device, the second signal comprising means for receiving the detection of the radar transmission, articles elephant is receiving the second signal, the number of the previous SL subframe Ru refrain from the transmission, wherein are increased in response to the reception of the second signal, the first according to claim 12 apparatus. A computer readable recording medium for detecting radar transmissions in a wireless network, comprising:
The first device, configured to communicate with other devices in the wireless network and operating in frequency division duplex mode, of several subframes of a frame of the downlink frequency band prior to detection of radar transmission. At least one instruction to refrain from sending in between
The first device is configured to monitor a first signal related to monitoring the radar transmission during the several subframes of the frame of the downlink frequency band. At least one instruction to cause the second device to send;
At least one instruction for causing the first device to receive a second signal related to the detection of the radar transmission from the second device;
The number of previous SL subframe the first device Ru refrain from the transmission, and at least one instruction for changing to the first device in response to an event, the event is the first A computer readable recording medium comprising at least one instruction to change device loading, or one or more of the receipt of the second signal.

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